Vulnerability · NVD

CVE-2026-75874

CVE-2026-75874 — critical severity (CVSS 10.0): 1 tracked app(s) concerned, all fixed or indeterminable on their current version.

CRITICAL 10.0 Published on 2026-08-18

Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154 and Thunderbird 154.

Attack vector : Network No privileges required No user interaction

Show raw CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Mozilla Thunderbird Windows winget:Mozilla.Thunderbird

Affected <154.0 Fixed in 154.0 Latest tracked 154.0 patched

Vulnerable CPE configurations (1)

Vendor	Product	Platform	Versions	CPE 2.3 URI
mozilla	thunderbird All platforms (wildcard)	All platforms (wildcard)	<154.0	cpe:2.3:a:mozilla:thunderbird::::::::